y = cos(2t), y = sin(2t);

t is greater than or equal to -pie and less than or equal to pie.

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- Jun 24th 2008, 08:06 PMcityismineHow do i convert this into a rectangular equation
y = cos(2t), y = sin(2t);

t is greater than or equal to -pie and less than or equal to pie. - Jun 24th 2008, 09:21 PMmr fantastic
- Jun 25th 2008, 08:34 AMMathstud28
Just so you know, given

and

You will always get a circle of radius a

and if you have

and

You will get an ellipse

- Jun 25th 2008, 09:10 AMgalactusQuote:

**-pie**and less than or equal to**pie**.

- Jun 25th 2008, 06:30 PMcityismine
The answer in the back of the book is: y=(1/2)x^2-1

Is the answer in the book wrong? - Jun 25th 2008, 06:37 PMMathstud28
- Jun 25th 2008, 07:09 PMmr fantastic
- Jun 25th 2008, 08:29 PMcityismine
Yes, I posted them correctly, I just double checked. I guess it's a typo in the book.